server lockdown
The most secure option is to never activate the server at all
by doing the following:

Set the When option to Never.

Always leave the Status in the OFF position.

With the above settings, no one can use the server to copy files
from the device. This also means that you can not connect
to the server to copy files to the device. To get files
to the device, you can download
files from a web server where you have placed the files.